Abstract Detail

Exploring the environmental side of the disease triangle in animal pathogens

Allender, Matthew [1], Bunick, David [1], Maddox, Carol [2].

Another fungal pathogen threatening conservation: epidemiology of ophidiomyces in free-ranging snakes.

With the current rate of declines in global biodiversity, it is apparent that wildlife diseases are serving as additional threats to population declines and potentially species extinctions. The emerging fungal pathogen, Ophidiomyces ophidiicola, (snake fungal disease; SFD) has been recently reported in wild pit viper populations from at least ten states. Health assessments prior to and after the emergence of this pathogen in a population of massasaugas demonstrate the utility of active clinical surveillance for identifying this pathogen. The disease presents as facial disfiguration due to granulomatous dermatitis, myositis, and osteomyeltits with intralesional fungi. Since 2012, more than a dozen new species of venomous and non-venomous species have been confirmed with SFD across more than 15 states. An experimental challenge was performed in the cottonmouth (Agkistrodon piscivorous) to describe the progression of disease, identify antemortem testing strategies, and develop a model for future studies. Concurrently, a real-time PCR was developed that is 1000 times more sensitive than conventional PCR and allowed detection of subclinical infections in these animals. Furthermore, this assay allowed detection of Ophidiomyces in swab samples, thus providing another means to monitor populations.  The prevalence of SFD is variable over time and trends in hematological and biochemical data are fairly consistent with results obtained prior to the emergence. However, future efforts should continue to evaluate all possible mechanisms to identify this disease to assess the health of the population in the face of new unknown threats.

1 - University of Illinois, Comparative Biosciences, 2001 S. Lincoln Ave., Urbana, IL, 61802, USA
2 - University of Illinois, Pathobiology, 2001 S. Lincoln Ave., Urbana, IL, 61802, USA

Keywords:
none specified

Presentation Type: Symposium or Colloquium Presentation
Session: SY2
Location: Room 103 AB/Kellogg Hotel and Conference Center
Date: Monday, June 9th, 2014
Time: 3:00 PM
Number: SY2001
Abstract ID:41
Candidate for Awards:None